Table 2.
Smoking Cessation Outcomes by Measure and Time Period
| Follow-up survey/Measure | Smoking status imputeda | Complete casesb | ||||
|---|---|---|---|---|---|---|
|
|
||||||
| Interv ention (%) |
Cont rol (%) |
RR (95% CI) |
Interv ention (%) |
Cont rol (%) |
RR (95% CI) |
|
| n=250 |
n=24 7 |
(unadjust ed) |
(unadjust ed) |
|||
| Primary outcome | ||||||
| 3-month | ||||||
| Biochemically confirmed 7-day point prevalence abstinence | 39 (15.60) | 27 (10.93) | 1.51 (0.89–2.55) | 39 (19.90) | 27 (13.04) | 1.53 (0.97–2.39) |
| Biochemically confirmed 30-day point prevalence abstinence | 32 (12.80) | 26 (10.53) | 1.12 (0.83–1.52) | 32 (16.33) | 26 (12.56) | 1.30 (0.81–2.10) |
| Secondary outcome | ||||||
| 1-month | ||||||
| Not smoked in past 7 days | 72 (28.80) | 39 (15.79) | 2.16 (1.39–3.34)** | 72 (34.78) | 39 (17.49) | 1.64 (1.25–2.15)*** |
| Not smoked in past 30 days | 31 (12.40) | 19 (7.69) | 1.70 (0.93–3.10) | 31 (14.90) | 19 (8.56) | 1.41 (0.97–2.03) |
| 3-month | ||||||
| Not smoked in past 7 days | 88 (35.20) | 56 (22.67) | 1.85 (1.25–2.75)** | 88 (44.90) | 56 (27.05) | 1.47 (1.21–1.78)*** |
| Not smoked in past 30 days | 73(29. 20) | 47 (19.03) | 1.76 (1.15–2.67)** | 73 (37.44) | 47 (22.71) | 1.41 (1.16–1.71)*** |
| 6-month | ||||||
| Not smoked in past 7 days | 73 (29.20) | 63 (25.51) | 1.21 (0.81–1.79) | 73 (41.95) | 63 (35.20) | 1.15 (0.93–1.44) |
| Not smoked in past 30 days | 60 (24.00) | 57 (23.08) | 1.05 (0.70–1.59) | 60 (33.52) | 57 (31.49) | 1.05 (0.84–1.31) |
| Late pregnancy | ||||||
| Not smoked in past 7 days | 86 (34.40) | 53 (21.46) | 1.35 (1.14–1.61)*** | 86 (46.49) | 53 (28.19) | 1.46 (1.20–1.78)*** |
| Not smoked in past 30 days | 69 (27.60) | 46 (18.62) | 1.27 (1.06–1.52)** | 69 (37.10) | 46 (24.21) | 1.34 (1.09–1.64)** |
| Postpartum | ||||||
| Not smoked in past 7 days | 41 (16.40) | 42 (17.00) | 0.98 (0.77–1.24) | 41 (35.96) | 42 (33.33) | 1.12 (0.66–1.91) |
| Not smoked in past 30 days | 35 (14.00) | 38 (15.38) | 0.95 (0.73–1.22) | 35 (29.66) | 38 (30.16) | 0.98 (0.56–1.69) |
Note: Boldface indicates statistical significance (*p<0.05; **p<0.01; ***p<0.001).
a
Missing data were imputed to indicate smoking; The full sample was used in the analysis.
b
No imputation of missing data; Only complete cases were used in this analysis.
RR, relative risk